Emergency lighting unit



FIG. 1 is a top plan view of an emergency lighting unit showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a fragmentary right side elevational view thereof on an enlarged scale, a portion of the housing being broken away for purposes of disclosure;

FIG. 4 is a left side elevational view thereof on an enlarged scale;

FIG. 5 is a front perspective view thereof; and

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a emergency lighting unit, as shown and described. 